America began to get more involved in Vietnam after communist forces were trying to reunite the country. Kennedy continued support of South Vietnam when he got into office, by increasing the number of troops in Vietnam. When Johnson, however, took office he was more cautious about conflict in Vietnam. In August 1964, Johnson announced torpedo boats from North Vietnam that had fired on American destroyers. After this attack Johnson went to congress for permission to defend American forces and allies. The Gulf of Tonkin Resolution was then authorized which gave the president power to repel all attacks and prevent any further harm. After the resolution was passes American troops were sent into Vietnam. The Vietnamese had the home court advantage in this war; they knew about mountain passages and all about the land in general. The war left America split in two which naturally caused protests and rallies. When Nixon got into he promised a scale back of Vietnam also known as Vietnamization. In the end without America, South Vietnam eventually fell.